Question

A 230V DC machine has an armature resistance of 0.422. If the full load
armature current is 20Amp.Find(1) The induce emf in armature when
machine acts as generator(2) Find Back emf when machine acts as motor
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Answer 1

Explanation:

Induced EMF in case of DC Generator is E=V+I

a

R

a

Hence, E=220+20×1

ThereforeE−V=20V